Perhaps you should try some spelling variations:
toc cach » hoc cach, toc sach, truoc cach
pham huu » pham duc, pham duy, phan huy
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
cach tu » cach thuc
lang xa » lang ha, dang xay, lang van
tu lang » cu lang, tu lanh, xu lang
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc cach tu lang xa hoi. hieu va ((chao xu) or (pham huu)) van hanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc cach tu lang xa hoi. hieu va ((chao xu) OR (pham huu)) van hanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: toc cach tu lang xa hoi. hieu va ((chao xu) or (pham huu)) van hanh vi ((cua tre) or (su triet))*.